Bergh



(No Model.)

H. VAN HOEVENBERGH.

UNISON FOR PRINTING TEL'EGRAPHS.

No. 316,855. Paten d Edy-2; 28, 1885.

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NITED STATES PATENT I Erica HENRY vAN HOEVENBERGH, or ELIZABETH, NEwJERSEY, ASSIGNOR To THE EALTIM EE 8101110 TELEGRAPH COMPANY, onBALTIMORE, MD.

UNISON FOR PRlNTlNG-TELEGRAPHS SPECIFICATION forming part of LettersPatent No. 316,855, dated April 28, 1885.

Application filed August 7, 1894. (No model.)

My invention relates to the class of appa IO ratus employed formaintaing the type-wheels 1 of a printing-telegraph instrument in unisonwith the transmitting apparatus.

The object of the invention is to provide a device which, while allowingthe printing to 1 be continuously effected from one of the typewheels,will be gradually moved into position to arrest the same at theirunison-point when printing is effected from the other type-wheel.

The invention consists in constructing the apparatus in substantiallythe following manner Two type-wheels are loosely mounted upon a shaft,and are normally coupled thereto by means of a ratchet-wheel and a clickengaging the same. The ratchet-wheel is se 2 5 cured to the type-wheelshaft,while the click or dog is carried upon one of the type wheels orthe sleeve carrying the same. A double platen, consisting of twoplaten-faces projecting from each'other at an angle, is provided 0 foreffecting impressions from the respective type-wheels. An electro-magnetis employed for controlling this platen, so that the one platen-face maybe presented to the one typewheel-or'the other platen-face to the other3 5 type-wheel at the will of the transmitting-operator. A device forengaging the retainingclick and forcing it out of engagement with theratchet-wheel, thereby releasing the typewheels from the type-wheelshaft, is also con- 40 trolled by the movements of the armature-leveremployed for controlling the movements of the platen. For this purposethe arm for releasing the retainingclick is frictionally supported upona suitable arbor, and is pro- 5 vided with a series of ratchet-teeth,which are designed to be engaged by a corresponding pawl during theoperation of printing from one of the type-wheels, preferably thetypewheelcarrying numerals. This pawl is carried upona' frame pivoted tothe printing-lever, and this frame is normally held in such tooth of theratchet-bar.

a position that the pawl will not engage the teeth of the ratchet-bar.IVhen, however, the platen has been moved so that an impression is takenfrom the figure type-wheel, the frame 5 5 is thrown into such positionthat the pawl will engage the ratchet and move the arm forward through adistance corresponding to one This operation will be repeated for eachdownward movement of the'press-lever after effecting an impression fromthe figure typewheel. The parts are so adjusted that if a given numberof impressionssay,four-be taken from the figu re typewheel in'succession the unison-arm will-be'in position to engage the locking pawlor click, and to thereby force itout of engagement with theratchet-wheel carried upon the type-wheel shaft. If, therefore, theescapement employed for advancing the type wheel be actuated when thereleasing-arm is in this position, the type-wheels will be unlocked fromthe shaft and be retained at their unisonpoint. It will be necessary,therefore, only to effect four impressions in succession from the figuretypewheel, and to then revolve the type-wheel shaft through one completerevolution, in order to insure that the type-wheels are at theirunison-point. By then effecting an impression from the letter type-wheelthe releasing or 8 unison arm will be withdrawn from the .path of theretaining-click, and the typewheels will be again locked to the shaft.In practice it is seldom desired to effect more than three impressionsfrom the figure. typewvheel with- 8 out the intervention of apunctuation-mark, orof a character carried upon the letter typewheel.

In the accompanying drawings, Figure 1 is a side elevation of such partsof a printing- 9o telegraph instrument as are necessary to illustratethe invention, and Fig. 2 is a plan view of the same. Fig. -3 is asideelevation showing the position of various parts of the instrumentduringthe operation ofeffectingaunison. 5

Referring to these figures, A represents the type-wheel shaft, uponwhich are carried two type-wheels, B and G. The type-wheels are rigidlysupported upon asleeve, 0, loosely surrounding the type-wheel shaft.Upon this shaftisrigidly supported a toothed wheel, d, the teeth ofwhich are designed to be engaged by a click or pawl, e. This paw],therefore, normally locks the type-wheels to the shaft, which isdesigned to be advanced step by step in any well-known manner. The pawlis pivoted to one of the type-wheels O, and it is provided with anextension, e,'carrying a projection, 6 This projection is designed to beengaged by a unison-arm, K, when it is desired to arrest the type-wheelsat their unisonpoint, in a manner which will be hereinafter described.One of the type-wheels, B, is designed to carry the more importantletters and certain marks of punctuation, while the other type-wheel, O,is intended to carry figures and such other characters as are lessfrequently employed. The impressions are effected from thesetype-wheels, respectively, by means of two platen-faces, g and g", whichare carried upon a double platen, G. The platen G is pivoted to apress-lever, H, which is actuated by means of an electro-magnet, M. Theplatenfaces 9 and g project from each other at a slight angle, so thatbut one of the same can be presented to its type-wheel at a time, and animpression will therefore be effected, when the press-lever is actuated,from the typewheel B or G,accordingly as the face or g is presented toits type-wheel, it being understood that the platen-faces arerespectively in the planes of the corresponding type-wheels.

For the purpose of controlling the position of the platen G, anelectro-magnet, m, is employed. This electro-magnet is designed to be inthe same circuit with the electro-magnet M; but its armature-lever mresponds only to currents of greater strength than those employed foractuating the press-lever H through the instrumentality of itselectro-magnet M. When, therefore, it is desired to effect impressionsfrom the type-wheel B, the armature-lever m is allowed to remain in itsposition away from its electro-magnet,and the currents employed foractuating the press-lever are of less strength than is required foractuating the armaturelever m. When, on the other hand, it is desired toeffect impressions from the type-wheel O, currents of greater strengthare employed than are necessary for actuating the press-lever H, and thearmature-lever m also responds to these currents. A link, m couples thearmature-lever m to the platen G. When, therefore, the armaturelever mis drawn toward its electro-magnet m, the platen G is turned upon itsaxis, so that the face g is turned at an angle to the confrontingportion of the type-wheel B, while the platenface is turned toward thetype-wheel C. An impression will therefore be effected under thesecircumstances from the type-wheel C only.

The change in the position of the lever m, for the purpose of effectingimpressions from the type-wheel O, is employed, also, for throwing apawl, Ir, into such position that it will engage a tooth of a rack,carried upon the unison-lever K. During the return move ment of thepress-lever, after effecting an impression from the figure type-wheel,the pawl moves the unison-arm K downward toward the path of theprojection 6 and thus toward the position which it occupies when itserves to release the type-wheels from their shaft. For this purpose thepawl '70 is carried in a frame, L, which is pivoted to the presslever H.The frame L is provided with two arms, a and of, the one of whichcarries the pawl 70, while the other carries a catch or pawl, k which isdesigned to return the unison-arm to its normal position when the leverfalls, after effecting 'an impression from the type-wheel C, in a mannerhereinafter described. The frame L is pivoted at a point, if, to thelever H. An extension, 10, projects from the frame L below the lever H,and the end of this extension is beveled in opposite directions, asshown. Applied to this extension is a spring, 10, carrying a beveledpoint, 10 which is designed to hold the frame L either in the positionshown in Fig. l or in the position indicated in Fig. 2 until itisforcibly moved therefrom. For the purpose of moving the frame L from oneto the other of its positions, a pin or projection, q, is carried uponthe armaturelever m, and this pin is designed to engage the beveled sideof a projection or catch, g, carried upon the frame L, when the armatureis moved toward its electro-magnet for the purpose of printing from thefigure type-wheel 0. Normally, the point q is out of the path of theprojection q; but when the press-lever is actuated by means of a currentof sufficient intensity todraw the armature-lever m forward, not onlywill the frame L be moved upward, but the point q will be moved forwardinto position to press against the projection q before the lever H hascompleted its upward movement, and to thereby turn the frame L upon itspivot, and cause the catch is to engage the rack k. The electro-magnet mis for this purpose designed to act more quickly than the electro-magnetM, although responding only to currents of greater strength than arerequired for actuating the latter. The point q will, therefore, bystriking the beveled side of the projection q, turn the frame L upon itsaxis, so that the pawl is will engage one of the teeth of the rack k.The subsequent downward movement of the lever H and frame L will causethe arm Kto also descend through the space corresponding to thatoccupied by one tooth of the rack-bar. The frame L will be held, bymeans of the spring 1) and point 19 acting upon the extension 1), in theposition which it has been caused to 00- cupy by reason of thearmature-lever m until it be forcibly removed therefrom. For thepurpose, however, of throwing the pawl is out of engagement with therack when it shall have advanced the same, a projection or stop, 4,extends from the arm n of the frame L, and this projection is engaged,when thelever H is near. the lower limit of its "movement, by meansof apin or stop, 1". If, therefore, the lever of frame L be turned into theposition shown in. Fig. 3, it will, when the lever H has descendednearly to its limit of movement, be tipped or turned back to its normalposition by the contact of the projection rwith the pin r. The pawl itwill thereby'be thrown 'out of engagement with the rack. If, however,the

succeeding impression is taken from the type-, wheel. 0, the operation.will be repeated, and the arm K will be drawn downward another tooth.The arm K-will be securely held in the successive positions which it iscaused, to

occupy by means of a friction-clutch, y, applied to its axis It isdesigned that four such movements shall throw the arm K into suchposition that its extremity k will engage the extension 6 upon the pawle, or be in the path to intercept its revolution, and to there-: bythrow it out of engagement with the ratch et-wheel d. If, therefore, thetype-wheel shaft the revolved, the type-wheel will be arrested, at apredetermined unison-point in this main ner.

polarized; armature commonly employed for actuating the escapement of aprinting-telegraph instrument becomes reversed under the influence of anabnormally strong current.

The positions subsequently occupied by the polarized armature in thisinstrument be reversed, the type-wheels will be set right when they havebeen brought to unison and are.

again locked to the shaft.

For the purpose of withdrawing the arm K from the path of the click thecatch k is employed. This catch projects into the path. of a pin, .8,carried upon the short arm of ,the lever K, when the frame L is in theposition shown inFig. 1. If, therefore, the frame L be allowed todescend in this position,the pawl It will engage the pin 8 and returnthe lever K to its normal position.

For the purpose of preventing the pawl from actuating the lever duringthe upward movement ofthe frame L, the pawl k may be pivoted to the arm,as shown at 's, in such a manner that it will turn backward a sufficientdistance to allow it to pass the pin. Likewise the pawl k may be pivotedto the arm n, as shown at 8 so that it will not move the lever K duringthe slight upward movement which it may receive after it has been forcedinto the rack The elasticity of the spring p may, however, be reliedupon for permitting a sufficient movement of the frame L for effectingboth these movements.

In an application of even date herewith, Serial No. 139,884, there isshown and described It sometimes occurs that the polarity of the It willbe i a unison device which is brought into action throughtheinstrumentality of the printinglever. Such an organization, however, isparticularly claimed in this application, rather than the one referredto.

I claim as my invention- 1. The combination, substantially ashereinbefore set forth, of a type-wheel shaft, two type-wheels carriedthereon, a locking device for coupling said type-wheels to said shaft, apress-lever for effecting impressions from said type-wheels, aunison-arm which remains at rest while impressions are effected from onetype-wheel, and means, substantially such as described,,for moving saidunison-arm into a position to unlock said type-wheels when impressionsare taken from the other type wheel.

2. The combination, substantially as hereinbeforeset forth, with atype-wheel shaft and two typewheels carried thereon, of a device forlocking said type-wheels to said shaft, a unison-arm for unlocking saidtype -wheels and arresting them at their unison-point,a press-lever foreffecting impressions from one or the other of said type-wheels,and adevice, caused by the movements of said press-lever when impressions arebeing taken from one of said type-wheels, to move said unison arm intoposition to unlock and arrest said typewheels.

3. The combination, substantially as hereinbefore set forth, withatype-wheel shaft and two type-wheels, of a device for locking saidtype-wheels to said type wheel shaft, two platen faces which arerespectively applied to said type-wheels, an electromagnet for causingone or the other of said platen-faces to be presented to its type-wheelaccordingly-as said electromagnet is or is not vitalized, an arm forreleasing said shaft from said typewheels, and means, substantially suchas described, serving to move said arm into position to so release saidshaft when 'a given number of impressions are successively effected fromone of said type-wheels, but not to so operate when impressions areeffected from the other of said type-wheels.

4. The combination, substantially as hereinbefore set forth, with twotype-wheels and a type-wheel shaft, of two platen-faces respectivelyapplied thereto, an electro-magnet for causing one or the other of saidplaten-faces to be presented to its type-wheel, an arm for arrestingsaid type-wheels at their unisonpoint, and a pawl for actuating saidarm, which pawl is caused to engage said arm when said electro-magnet isvitalized.

5. The combination, substantially as hereinbefore set forth, of twotype-wheels, a printing-lever for effecting impressions from saidtype-wheels, an electro-magnet for determining from which of saidtype-wheels impressions shall be effected by said lever, a unisonarm forarresting saidtype-wheels at their unison-point, a pawl which is causedto engage said unison-arm and to advance it into a position to arrestsaid type-wheels when said electro-magnet is vitalized, and means,substantially such as described, for disengaging said pawl from said armwhen it has advanced the same after an impression has been effected.

6. In a printing-telegraph instrument, the combination, substantially ashereinbefore set forth, with a press-lever and a unison-arm for thetype-wheels, of a pivoted support carried upon said press-lever, anelectro-magnet, its armature and armature lever, which armature-lever isnormally out of the path of said support, but which, when actuated,serves to turn said support upon its axis, and a pawl carried upon saidsupport, which pawl, when the support is thus turned, engages saidunison-arm and advances the same a predetermined distance each time saidpress-lever is actuated.

7. The combination, substantially as hereinbefore set forth, with twotype-wheels and a press-lever for effecting impressions therefrom, of aunison-arm applied to said type Wheels, a pawl for engaging saidunison-arm, which pawl is normally out of the path of said unison-arm,means, substantially such as described, for causing said pawl to engagesaid unison-arm and to advance it a predetermined distance during themovement of said lever away from said type-wheels, and a stop forthrowing said pawl out of engagement with said arm each time it has soadvanced the same.

8. The combination, substantially as hereinbefore set forth, with theprinting-lever of a printing-telegraph instrument, of a unisonarm, aratchet carried thereon, a support pivoted to said printing-lever, apawlcarried up on said support, an electro-magnet, astop operated by saideleotro-magnet for causing said pawl to engage said ratchet during theupward movement of said printing-lever, and a second stop for causingsaid pawl to be disengaged from the ratchet during the downward movementof said printing-lever.

9. The combination, substantially as hereinbefore set forth, with theprinting-lever H and the unison-arm K, of the frame L, pivoted to saidlever, the pawl is, carried upon said frame, the ratchet carried uponsaid unison-lever, and means, substantially such as described, forcausing said pawl to engage said ratchet.

10. The combination, substantially as hereinbefore set forth, oftwotype-wheels, a printing-lever for effecting impressions from saidtype-wheels, a unison-arm applied to said type-wheels, a pawl actuatedby said presslever for moving said unison-arm into position .to arrestsaid type-wheels, an electro-magnet for controlling the position of saidpawl with reference to said unison-arm and for advancing the same intoposition to arrest said typewheels when impressions are taken from oneof the same, and a second pawl actuated by said printing-lever andserving to move said unison-arm out of the path of said type-wheels whenimpressions are effected from the other type-wheel.

11. The combination, substantially as hereinbefore set forth,with atype-wheel shaft and two type-wheels carried upon the same, of aratchet-wheel secured to said shaft, alockingpawl moving with saidtype-wheels, which pawl normally locks said type-wheels to said shaft,and a unison-arm serving to mechanically engage said pawl, and therebydisengage said type-wheels from said shaft,and to arrest them at theirunison-point.

12. The combination, substantially as hereinbefore set forth, of atype-wheel shaft, a ratchet-wheel applied to said shaft, two typewheelsloosely mounted upon said shaft, a pawl for looking said type-wheels tosaid shaft, and a unison-arm for mechanically engaging said pawl,thereby unlocking said type-wheels and arresting them at theirunison-point, substantially as described.

13. The combination,substantially as hereinbefore set forth, with twotype-wheels, the one carrying letters and the other carrying figures, ofa unison-arm, and means, substantially such as described, for causingsaid unison-arm to arrest said type-wheels at their unison point whenfour successive impressions have been taken from said figure typewheel.

14. The combination, substantially as hereinbefore set forth, in aprinting-telegraph instrument, of a figure type-wheel and a lettertype-wheel, a unison-stop, and means for operating said unison-stop whenimpressions are effected from said figure typewvheel.

15. The combination, substantially as hereinbefore set forth, in aprinting-telegraph instrument, of two type-wheels, means for effectingimpressions from either of the same, a unison-stop, and means foroperating the same when printing is effected from one of saidtypewheels.

16. In a printing-telegraph instrument, a unison-stop and mechanicalmeans for bringing the same into action by the printing-lever.

17. In a printing-telegraph instrument, a unison-stop and mechanicalmeans for bringing the same'into position to unison the instrument bythe movements of the printing-lever.

In testimony whereof I have hereunto subscribed my name this 26th day ofJune, A. D. 1884.

HENRY VAN HOEVENBERGH. [Ls] Witnesses: DANL. W. EDGECOMB,

CHARLES A. TERRY.

